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Math Unit 12 Graphs

TermDefinition
Bar Graphs Used to compare data in different categories. This is qualitative data.
Dot Plots One of the simplest data plots, used for smaller data sets. They are histogram-like and can be used for either qualitative (categorical) or quantitative data.
Frequency Tables Show the number of time a data value occurs in a set of data.
Scatter Plots Use to plot specific data points from a data set and to show the relationship between two variables in the situation. Relationship between two variables is called the correlation.
Histograms Divide data into equal classes and display the frequency of numerical data values that fall into each class.
Shape and distribution + random Left-skewed: Has a tail of the left side of the histogram and means that the mean will be less than the median, right skewed means that there is a tail on the right side and means will be greater than the median, and bell shaped points are equal m = m
Stem-and-leaf plots Used to show frequency between data values, organize data and quick finding mode and median. Must have a Key.
Box and Whisker Plot There are a 5-point summary of a set of data, they do not include all of the individual data points, and instead they only include the minimum, lower quartile, upper quartile, median, and the maximum.
Percentiles Divide ordered data into hundredths. A data item is said to be in the kth percentile of a data set if the k% if the data are less than the item
Percentile - Q1, Q2, Q3 Q1= 25th percentile, Q2 = 50th, Q3 = 75th
Created by: nuhaSalim
 

 



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